<http://webisa.webdatacommons.org/163759866>	<http://www.w3.org/ns/prov#value>	"FIG. 9 is an image of a double-headed toothbrush that meets the contour adaptive force measurements according to the principles of the present invention." .
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<http://webisa.webdatacommons.org/prov/466788147>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/163759866> .